Fixes issue where no package name is set

Author: raphaelstolt

src/Commands/TreeCommand.php

@@ -96,14 +96,19 @@ protected function execute(InputInterface $input, OutputInterface $output): int
 
     protected function getPackageName(): string
     {
-        if (!\file_exists($this->directoryToOperateOn . DIRECTORY_SEPARATOR . 'composer.json')) {
+        if (!\file_exists(WORKING_DIRECTORY . DIRECTORY_SEPARATOR . $this->directoryToOperateOn . DIRECTORY_SEPARATOR . 'composer.json')) {
             return 'unknown/unknown';
         }
 
         $composerContentAsJson = \json_decode(
-            \file_get_contents($this->directoryToOperateOn . DIRECTORY_SEPARATOR . 'composer.json'),
+            \file_get_contents(WORKING_DIRECTORY . DIRECTORY_SEPARATOR . $this->directoryToOperateOn . DIRECTORY_SEPARATOR . 'composer.json'),
             true
         );
+
+        if (!isset($composerContentAsJson['name'])) {
+            return 'unknown/unknown';
+        }
+
         return \trim($composerContentAsJson['name']);
     }
 }